I start some of my talks with a joke: back in my day, we didn’t have monitoring or observability. We’d go to the server and give it a kick. Hear the HD spin? It’s working!
We didn’t have DevOps. If we were lucky, we had some admins and a technician to solve hardware issues. That’s it. In a small company, we would do all of that ourselves. Today this is no longer practical. The complexity of deployment and scale is so big it’s hard to imagine a growing company without an engineer dedicated to the operations.